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Allowance for Credit Losses - Summary of Impaired Loans (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($)
Financing Receivable, Impaired [Line Items] |
With an allowance recorded, Recorded Investment | $ 0
With an allowance recorded, Unpaid Principal Balance | 0
With an allowance recorded, Related Allowance | 20
Total, Recorded Investment | 7,313
Total, Unpaid Principal Balance | 7,370
Total, Related Allowance | 20
With no related allowance recorded, Average Recorded Investment | 7,376
With no related allowance recorded, Interest Recognized | 293
With an allowance recorded, Average Recorded Investment | 23
With an allowance recorded, Interest Recognized | 1
Total, Average Recorded Investment | 7,399
Total, Interest Recognized | 294
Agriculture Loans [Member] |
Financing Receivable, Impaired [Line Items] |
With no related allowance recorded, Recorded Investment | 300
With no related allowance recorded, Unpaid Principal Balance | 300
With an allowance recorded, Recorded Investment | 0
With an allowance recorded, Unpaid Principal Balance | 0
With an allowance recorded, Related Allowance | 0
Total, Recorded Investment | 300
Total, Unpaid Principal Balance | 300
Total, Related Allowance | 0
With no related allowance recorded, Average Recorded Investment | 200
With no related allowance recorded, Interest Recognized | 9
With an allowance recorded, Average Recorded Investment | 0
With an allowance recorded, Interest Recognized | 0
Commercial Loans [Member] |
Financing Receivable, Impaired [Line Items] |
With no related allowance recorded, Recorded Investment | 35
With no related allowance recorded, Unpaid Principal Balance | 55
With an allowance recorded, Recorded Investment | 20
With an allowance recorded, Unpaid Principal Balance | 20
With an allowance recorded, Related Allowance | 20
Total, Recorded Investment | 55
Total, Unpaid Principal Balance | 75
Total, Related Allowance | 20
With no related allowance recorded, Average Recorded Investment | 39
With no related allowance recorded, Interest Recognized | 0
With an allowance recorded, Average Recorded Investment | 23
With an allowance recorded, Interest Recognized | 1
Commercial Real Estate Loans [Member] |
Financing Receivable, Impaired [Line Items] |
With no related allowance recorded, Recorded Investment | 2,306
With no related allowance recorded, Unpaid Principal Balance | 2,312
With an allowance recorded, Recorded Investment | 0
With an allowance recorded, Unpaid Principal Balance | 0
With an allowance recorded, Related Allowance | 0
Total, Recorded Investment | 2,306
Total, Unpaid Principal Balance | 2,312
Total, Related Allowance | 0
With no related allowance recorded, Average Recorded Investment | 2,365
With no related allowance recorded, Interest Recognized | 125
With an allowance recorded, Average Recorded Investment | 0
With an allowance recorded, Interest Recognized | 0
Residential Real Estate Loans [Member] |
Financing Receivable, Impaired [Line Items] |
With no related allowance recorded, Recorded Investment | 4,652
With no related allowance recorded, Unpaid Principal Balance | 4,683
With an allowance recorded, Recorded Investment | 0
With an allowance recorded, Unpaid Principal Balance | 0
With an allowance recorded, Related Allowance | 0
Total, Recorded Investment | 4,652
Total, Unpaid Principal Balance | 4,683
Total, Related Allowance | 0
With no related allowance recorded, Average Recorded Investment | 4,772
With no related allowance recorded, Interest Recognized | 159
With an allowance recorded, Average Recorded Investment | 0
With an allowance recorded, Interest Recognized | 0
Consumer Loans [Member] |
Financing Receivable, Impaired [Line Items] |
With no related allowance recorded, Recorded Investment | 0
With no related allowance recorded, Unpaid Principal Balance | 0
With an allowance recorded, Recorded Investment | 0
With an allowance recorded, Unpaid Principal Balance | 0
With an allowance recorded, Related Allowance | 0
Total, Recorded Investment | 0
Total, Unpaid Principal Balance | 0
Total, Related Allowance | 0
With no related allowance recorded, Average Recorded Investment | 0
With no related allowance recorded, Interest Recognized | 0
With an allowance recorded, Average Recorded Investment | 0
With an allowance recorded, Interest Recognized | 0
Municipal Loans [Member] |
Financing Receivable, Impaired [Line Items] |
With no related allowance recorded, Recorded Investment | 0
With no related allowance recorded, Unpaid Principal Balance | 0
With an allowance recorded, Recorded Investment | 0
With an allowance recorded, Unpaid Principal Balance | 0
With an allowance recorded, Related Allowance | 0
Total, Recorded Investment | 0
Total, Unpaid Principal Balance | 0
Total, Related Allowance | 0
With no related allowance recorded, Average Recorded Investment | 0
With no related allowance recorded, Interest Recognized | 0
With an allowance recorded, Average Recorded Investment | 0
With an allowance recorded, Interest Recognized | $ 0

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